This is the 10667th most frequent Korean word.
군사훈련에
"군사훈련에" means "in military training."
Here, '군사훈련에' describes the subject's action of participation in the context of military training.
군사훈련에 참여하는 것은 매우 힘들다.
Participating in military training is very challenging.
'군사훈련에' is not the main word here; instead, '군사훈련에서' modifies the context to 'from the military training.'
그 군사훈련에서 얻은 경험은 매우 값지다.
The experiences obtained from that military training are very valuable.
'군사훈련에 대한' refers to an idea or topic related to military training.